求问GRE猴哥数学难题11217.The “combined age” of a group of people is the sum of the ages of all the people in the group.Which of the following groups had the greatest combined age in 1986?　　A.20-year-old males B.20-year-old females

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求问GRE猴哥数学难题11217.The “combined age” of a group of people is the sum of the ages of all the people in the group.Which of the following groups had the greatest combined age in 1986?　　A.20-year-old males B.20-year-old females
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求问GRE猴哥数学难题11217.The “combined age” of a group of people is the sum of the ages of all the people in the group.Which of the following groups had the greatest combined age in 1986?　　A.20-year-old males B.20-year-old females
求问GRE猴哥数学难题112
17.The “combined age” of a group of people is the sum of the ages of all the
people in the group.Which of the following groups had the greatest combined age
in 1986?
　　A.20-year-old males B.20-year-old females
　　C.60- year-old males D.60-year-old females
　　E.80-year-old females

求问GRE猴哥数学难题11217.The “combined age” of a group of people is the sum of the ages of all the people in the group.Which of the following groups had the greatest combined age in 1986?　　A.20-year-old males B.20-year-old females
擦,这题有啥难的,就读个图,做个乘法呗.小学生的题.
不过,也看出来,老美的题真TMD实用,这TM才叫应用题呢.

求问GRE猴哥数学难题11217.The “combined age” of a group of people is the sum of the ages of all the people in the group.Which of the following groups had the greatest combined age in 1986?　　A.20-year-old males B.20-year-old females GRE 猴哥112数学难题, GRE数学难题求解看不懂 GRE猴哥数学难题112 第75题最后说 to the nearest mile 为什么不选25 而选73 问初中数学难题 猴哥GRE数学难题112题第11是什么意思,求破! 求数学难题!八年级数学难题!、 GRE数学中的 The range 值域?定义域?就比如一句话中“the range of the five number is 2 or more” 这里的range是指值域还是定义域?可参照猴哥数学112道难题中的第48题“if the average of x,y,z,5,and 7 is 8,which of 求数学立体几何难题 gre数学.124求解答 求9道七下数学难题, 急求小学数学难题 求数学初中几何难题 求一道数学平行四边形难题. 急求,数学难题.速度 一道数学难题求详解 数学!世界性难题!（初中.）求大神帮忙,是第二问. 求一道高一数学难题第二个问的第二个小问详解